Sectional boiler



- (No Mddel.)

'H..D.ROGE RS. SEO'TIONAL BOILER.

No. 542,281. Patented July 9, 1895.

WITNESSES:

E STATES HOMER D. noenns, on CHICAGO, 'lLL'lNQIS.

SECT'IO'NAL BOILER.

SPECIFICATION forming part of Letters Patent No. 542,281, dated July 9, 1895.

Application filed March 11, 1895.

$erial No. 541,208. (No model.)

To all whom it may concern:

Be it known that I, HOMER D. Rooms, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Sectional Boilers, of which the following is a specification.

My invention relates to improvements in a sectional boiler which is the subject of Letters Patent of the United States No. 521,746, which was issued to George A. Watson June 19, 1894; and my object is to make changes in the construction, which in several particulars have given much better results in practice than have been heretofore attained, the same being hereinafter fully described, and illustrated in the accompanying drawings, in which- Figure l is an axial vertical section through the several sections on brokenline 6 7 of Fig. 3. Fig.2 is an axial vertical section on broken line 8 9, Fig. 3. Fig. 3 is a planof one of the most important sections of the boiler, showing arrangement of air or gas and water passage-ways. Fig. 4 is a bottom plan of Fig. 3. Fig. 5 is a plan of one of the boiler-sections, which is superimposed directly upon the top of the section shown in Fig. 3, and there are three other sections of the ordinary construction shown in Fig. 1,which are successively superimposed upon the section shown in Fig. 5.

Similar letters indicate like parts throughout the several views.

A is the base-ring, which has a bottom A and forms the ash-pit, there being a series of grates B at the top thereof, which form the bottom for the hollow center of section-ring C and the hollow center of section-ring D, imposed thereon, which form the fire-chamber. Upon the hollow water-section D is mounted the hollow water-section E, Fig. 5, the fiueless central portion thereof closing the central hollow portion of section D and forms the top of the fire-chamber. The section D projects inwardly over the margin of section 0, and vertically therethrough is a series of gas-fines F, which register with a series of vertical gasflue G in section E. Above section E are successively mounted the hollow water-sections H, I, and J, which are respectively provided with gas-fines K, L, and M, and to the top of flue M the chimney connection is attached.

At the top'ofsection D are two passagei ways N and N, which serve for carrying air from the outside of the furnace to the space within the fire-chamber. The side and bottom walls of passage-ways N andN' are usually cast integral with section D, but the top thereof is formed by the bottom of the superimposed section E.

At 0 is the usual orifice through which fuel is introduced, and is closed by any suitable door P.

The water-inlet pipes are shown at Q and Q, attached to the sides of the bottom watersection 0.

There are side passage-ways R at both sides of all the sections,-whose ports register when thesections are bolted together in proper position and form the usual hollow columns, through which water may pass into or out of any section and upward to the top section and out through the outlet-pipes S and S to be distributed as desired.

The principal difference between the construction of the boiler herein illustrated and described and that embodied in the patent hereinbefore referred to consists in the relative disposition of the three lower sections which form the fire-chamber, in combination with a substantially air-tight ash-pit chamber which has grates at the top thereof, through which no air passes, since the grates are intended to serve simply as the bottom of the fire-chamber to sustain the fuel and adapted to permit the ashes from the fuel to fall through the usual openings therein down into the ash-pit chamber. Itwill be noticed that the height of sections 0 and D is such that the fire-chamber is of comparatively large size,

and the height of the inwardly-proj ectin g portion V of section D above the grates permits of a more than usual body of fuel. When the fire-chamber is charged with fuel, it should be filled up to a height not less than that indicated by the irregular broken line T, Figs. 1 and 2, the top surface of the fuel being in contact with the inwardly-projecting portion V of section D, and after the fuel is ignited all the air to support combustion flows in through the passage-ways N N above the fuel, thence downwardly through the top portion of the fuel, then outwardly and upwardly through fines F of section D and flues G through sectionE, thence to the chimney at flue M of section J, through the fines K and L of the superimposed sections H and I, as indicated by the arrows.

In practice, so long as the top surface of the fuel is kept up approximately to the broken line T, there will not only be very perfect oombustion but if sufficient air is admitted a very high temperature, which is confined almost wholly to the upper portion of the fuel, the lower portion thereof, together with the ashes, always protecting the grates B from injury by the heat.

I claim as my invention- The combination in a sectional boiler furnace, of a grate, an air tight chamber below the grate, forming the ash pit, a substantially annular chamber at the sides above and surrouudingthe grate and forming the fire chamber, a hollow water section above the annular water chamber, forming the closed top of the fire chamber, air passageways opening into the top portion of the fire chamber, and fines leading vertically from the sides at the middle or lower portion of the fire chamber through the annular water chamber, and through the water chamber which is imposed upon the annular water chamber, as hereinbefore stated. In testimony that I claim the foregoing I have hereunto set my hand, this 8th day of March, 1895, in the presence of witnesses.

HOMER D. ROGERS. Witnesses:

OSCAR SNELL. II. H. HALE. 

